Electric kettle



FIG. 1 is a top front perspective view of an electric kettle showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom view thereof.

The broken line showing in the figure drawings are included for the purpose of illustration and form no part of the claimed design. 

CLAIM The ornamental design for an electric kettle, as shown and described. 